Energy Converter

About Energy Conversion

Convert between scientific, electrical, and thermal energy units. Enter any value to see all equivalents.

Units Included

• Joule (J) - SI unit.
• Calorie (cal) & Kilocalorie (kcal) - Food/Heat.
• Watt-hour (Wh) & kWh - Electricity.
• Electronvolt (eV) - Atomic physics.
• BTU - Thermal.

How to Use

1. Enter a value in any energy unit field.
2. Read instant conversions in other fields.
3. Use Reset to clear all values.

Unit Differences

• 1 kcal = 4184 J (thermochemical).
• 1 kWh = 3.6 MJ = 3,600,000 J.
• 1 BTU ≈ 1055.06 J.
• 1 eV ≈ 1.602 × 10⁻¹⁹ J.